Nikon Camera D850a UV/IR-Cut (75007)

The small "a" in the camera model stands for astromodified. Standard cameras are equipped with a filter that reduces the red spectral range, allowing the sensor to capture colors similar to human vision during the day. However, this filter also blocks the important H-alpha wavelength, which is essential for photographing glowing gas nebulae in astronomy. During astromodification, this filter is removed, increasing the camera’s sensitivity to red light, especially in the H-alpha and SII ranges.

With astromodification, the DSLR becomes much more effective for astrophotography, making it possible to capture faint gas nebulae that are otherwise difficult to photograph. Because these nebulae are often very large, the camera's large sensor is fully utilized for wide-field images.

Advantages of an Astromodified DSLR for Astrophotography

• Ideal for capturing extensive nebulae, thanks to the large sensor and increased H-alpha sensitivity.

• Built-in computer functionality means no need for a laptop or external power supply, reducing cable clutter.

• Wide range of accessories and versatile applications.

• Monitor with LiveView for easy focusing and image composition.

Astromodification is performed by AstroHobby in Italy, where the original Canon filter is replaced. There are several types of astromodification available:

Baader Astromodification: Uses the Baader Planetarium BCF filter, developed in Germany, which allows light from 420-680 nm to reach the sensor. This provides four times higher sensitivity to H-alpha than an unmodified camera.

Super UV/IR-Cut Astromodification: Similar to the Baader filter, but with an even wider transmission range (400-700 nm), allowing the camera to capture all visible light.

Full Range Astromodification: The camera becomes sensitive to ultraviolet, visible, and infrared light starting at 300 nm. This version is ideal for maximum flexibility. With additional filters, the camera can be used for standard daylight photography, pure infrared imaging, or advanced astrophotography.

The astromodified camera is delivered with the same accessories as the original manufacturer: camera body, battery, charger, USB cable, and manual.

Please note: For astromodification, the original packaging is opened and the camera is tested, so the shutter count will not be zero. However, the cameras are not used, and any used items are clearly marked as such in the shop.

Specifications

Capacity

• Designation: D850